wasm-micro-runtime/core/shared/utils/bh_common.c

/*
 * Copyright (C) 2019 Intel Corporation.  All rights reserved.
 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 */

#include "bh_common.h"

#ifdef RSIZE_MAX
#undef RSIZE_MAX
#endif

#define RSIZE_MAX 0x7FFFFFFF

int
b_memcpy_s(void * s1, unsigned int s1max,
           const void * s2, unsigned int n)
{
  char *dest = (char*)s1;
  char *src = (char*)s2;
  if (n == 0) {
    return 0;
  }

  if (s1 == NULL || s1max > RSIZE_MAX) {
    return -1;
  }
  if (s2 == NULL || n > s1max) {
    memset(dest, 0, s1max);
    return -1;
  }
  memcpy(dest, src, n);
  return 0;
}

int b_memmove_s(void * s1, unsigned int s1max,
                const void * s2, unsigned int n)
{
  char *dest = (char*)s1;
  char *src = (char*)s2;
  if (n == 0) {
    return 0;
  }

  if (s1 == NULL || s1max > RSIZE_MAX) {
    return -1;
  }
  if (s2 == NULL || n > s1max) {
    memset(dest, 0, s1max);
    return -1;
  }
  memmove(dest, src, n);
  return 0;
}

int
b_strcat_s(char * s1, unsigned int s1max, const char * s2)
{
  if (NULL == s1 || NULL == s2
      || s1max < (strlen(s1) + strlen(s2) + 1)
      || s1max > RSIZE_MAX) {
    return -1;
  }

  memcpy(s1 + strlen(s1), s2, strlen(s2) + 1);
  return 0;
}

int
b_strcpy_s(char * s1, unsigned int s1max, const char * s2)
{
  if (NULL == s1 || NULL == s2
      || s1max < (strlen(s2) + 1)
      || s1max > RSIZE_MAX) {
    return -1;
  }

  memcpy(s1, s2, strlen(s2) + 1);
  return 0;
}

char *
bh_strdup(const char *s)
{
    uint32 size;
    char *s1 = NULL;

    if (s) {
        size = (uint32)(strlen(s) + 1);
        if ((s1 = BH_MALLOC(size)))
            bh_memcpy_s(s1, size, s, size);
    }
    return s1;
}

char *
wa_strdup(const char *s)
{
    uint32 size;
    char *s1 = NULL;

    if (s) {
        size = (uint32)(strlen(s) + 1);
        if ((s1 = WA_MALLOC(size)))
            bh_memcpy_s(s1, size, s, size);
    }
    return s1;
}